High temperature boric acid solubility from plant condition during post-LOCA long-term cooling period = 냉각재 상실사고 후 장기냉각 시 발전소 조건에서의 고온영역 붕산석출에 관한 실험적 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 691
  • Download : 0
This study examines boric acid solubility in six different mixture solutions simulating plant conditions over a temperature range of 60~140℃. For preparing experiment, screening process and scaling analysis was performed. We selected five key additives reflecting the physical and chemical priority: tri-sodium phosphate (TSP), NUKON, calcium silicate, sodium aluminum silicate ( $NaAlSi_3O_8$ ), and calcium phosphate ( $Ca_3(PO_4)_2$ ). The masses of the additives were scaled for the experiment. The scaled-down plant condition refers to Kori-1. KAIST high pressure and high temperature experiment facility was made for the experiment. Test solutions were heated and mixed to produce homogeneous solution and cooled to observe precipitation. Snow-like white precipitates were found mostly at interfaces between liquid and steam in the early of cooling phase in the interior structure of the facility. TSP (14g) in the solution showed a slightly increased solubility of boric acid under 80℃, but had little effect at 80-140℃. Also, it turned out that other additives slightly decreased the boric acid solubility. We suggested a physical model to predict boric acid solubility considering the effect of additives. The model includes two empirical constants which estimate activity coefficient as a function of temperature. We suggested two empirical models: best-estimation and conservative models.
Advisors
No, Hee-Cheonresearcher노희천researcher
Description
한국과학기술원 : 원자력및양자공학과,
Publisher
한국과학기술원
Issue Date
2008
Identifier
301968/325007  / 020073090
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 원자력및양자공학과, 2008. 8., [ ix, 64 p ]

Keywords

boric acid; solubility; LOCA; precipitation; solubility model; 붕산; 용해도; 냉각재상실사고; 석출; 용해도 모델

URI
http://hdl.handle.net/10203/49547
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=301968&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0